Take tan, red, cream and green colored felts. Start with the tan colored felt and cut it in half. Fold over the corner to form a pizza slice. Hot glue the side with the crust.
Now cut a red triangle as sauce, and then cut cream as cheese. Cut a scalloped edge for the cream color.
Then cut small green rectangles, red circles.
Assemble all the three colors as the flap of the bottom pizza crust and glue them with glue gun.
Finally, glue all the cut rectangles and circles on the flap of the pizza crust. That's it slide over the book pages and mark spot.